Fire Testing of PFP Coatings Improves Safety

teel remains the backbone of modern infrastructure, and it enables the rapid construction of robust structures, such as sports arenas, airports, high-rise complexes, and advanced manufacturing plants.But, if fire hits, strength alone won't cut it.According to the American Institute of Steel Construction, structural steel typically loses about 50% of its load-bearing capacity at temperatures around 1,100 F (593 C), depending on load conditions and design factors.Cellulosic fires can quickly reach these temperatures and are fueled by common materials like wood, textiles, and paper.As a safeguard, building codes often require passive fire protection (PFP) systems.Among the best solutions are intumescent coatings, which are protective layers applied to steel.These coatings provide fire resistance while allowing architectural design flexibility.With efficient application methods and fast dry times, their use is growing.When exposed to high temperatures, intumescent coatings chemically react and expand to form a stable, insulating char.This char significantly reduces heat transfer to the steel, which helps maintain its load-bearing capacity for a specified period and is critical for evacuation and firefighting efforts.But for this system to work as intended, accurate fire testing is needed.